16217318375473 has 2 divisors, whose sum is σ = 16217318375474. Its totient is φ = 16217318375472.

The previous prime is 16217318375471. The next prime is 16217318375521. The reversal of 16217318375473 is 37457381371261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11505345154209 + 4711973221264 = 3391953^2 + 2170708^2 .

It is a cyclic number.

It is not a de Polignac number, because 16217318375473 - 2¹ = 16217318375471 is a prime.

Together with 16217318375471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16217318375471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8108659187736 + 8108659187737.

It is an arithmetic number, because the mean of its divisors is an integer number (8108659187737).

Almost surely, 2^{16217318375473} is an apocalyptic number.

It is an amenable number.

16217318375473 is a deficient number, since it is larger than the sum of its proper divisors (1).

16217318375473 is an equidigital number, since it uses as much as digits as its factorization.

16217318375473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17781120, while the sum is 58.

The spelling of 16217318375473 in words is "sixteen trillion, two hundred seventeen billion, three hundred eighteen million, three hundred seventy-five thousand, four hundred seventy-three".